First-time users of osteoporosis drugs called oral bisphosphonates may be at increased risk for serious inflammatory eye disease, a new study contends. Oral bisphosphonates, such as Fosamax and Actonel, are the most commonly prescribed class of drugs to prevent or slow osteoporosis, a disease that causes very weak bones. Previous studies have linked the drugs to problems such as unusual fractures, irregular heartbeat and esophageal and colon cancer